I have installed SonarLint 4.1 from Eclipse Marketplace, but when I try to configure it via Window > Show View > Other… there is no selection for Sonar or SonarLInt. I have also tried looking in Preferences, as well as right-clicking on my project and picking Configure. Eclipse says it is installed, but cannot find it anywhere. I have installed/uninstalled/reinstalled several times to no avail.
Running Eclipse 4.10 (2018-12) using OpenJDK 11.0.1+9 on MacOS 10.13.6
The best way to install is to use the Eclipse p2 client, or the marketplace. Manual installation can also be done using the dropins feature.
But copying files in plugins or features folder is very likely to fail and break your Eclipse installation (there are various caches in some places).
Tried several different ways to install, but eventually had to reinstall Eclipse in order to get SonarLint to work. Everything is now working properly with the new Eclipse install.